PHP Manual
MySQL Functions
Returns the length of the specified field

mysql_field_len

(PHP 4, PHP 5)

mysql_field_len — Returns the length of the specified field

Warning This extension was deprecated in PHP 5.5.0, and it was removed in PHP 7.0.0. Instead, the MySQLi or PDO_MySQL extension should be used. See also MySQL: choosing an API guide and related FAQ for more information. Alternatives to this function include:

mysqli_fetch_field_direct() [length]
PDOStatement::getColumnMeta() [len]

Description

mysql_field_len ( resource $result , int $field_offset ) : int|false

mysql_field_len() returns the length of the specified field.

Parameters

result: The result resource that is being evaluated. This result comes from a call to mysql_query().
field_offset: The numerical field offset. The field_offset starts at 0. If field_offset does not exist, an error of level E_WARNING is also issued.

Return Values

The length of the specified field index on success or FALSE on failure.

Examples

Example #1 mysql_field_len() example

<?php$result = mysql_query("SELECT id,email FROM people WHERE id = '42'");if (!$result) { echo 'Could not run query: ' . mysql_error(); exit;}// Will get the length of the id field as specified in the database// schema. $length = mysql_field_len($result, 0);echo $length;?>

Notes

Note:
For backward compatibility, the following deprecated alias may be used: mysql_fieldlen()

Php/docs/function.mysql-field-len

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